Is350 fsport Check Headlight System

Hello Everyone
Yesterday I lowered my is350 and I am happy with the result apart from one thing

Whenever I start the car I get the words CHECK HEADLIGHT SYSTEM in my dash and the red exclamation mark!

I have tried moving the two switches at both LHS wheels. The switches make no difference to the height of the headlights and no matter what adjustment I have the message still comes up in the dash

Is there something else I need to do to remedy this?

All help will be greatly appreciated

My car is a 2011 IS350 Fsport

Many thanks

Darren